Door-buffer.



A. s. NEWTON.

DOOR BUFFER.

APPLIOATION FILED APR. 8, 1914.

Patented Feb. 2, 1915.

2 SHEETSSHEET 1.

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DOOR BUFFER. APPLICATION FILED APR.8.1914.

Patented Feb. 2, 1915.

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' of a modified form of buffer, Fig. 9, a sec-- UNITED STATES PATENToFmo ALBERT S. NEWTON, OF PROVIDENCE, RHODE ISLAND.

DOOR-BUFFER.

Specification of Letters Patent.

Patented Feb. 2, 1915.

Application filed April 8, 1914. Serial No. 830,348.v

To all whom it may concern Be it known that I, ALBERT S. NEWTON. a.citizen of the United States, residing at Providence, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Door-Bufiers, of which the following is aspecification.

My invention relates to door buffers and has for its essential objectsthe provision of means for engaging and disengaging the door with andfrom contact with the bearing member of the bufier to rovide/for theregulation of the tension 0? the spring which presses upon the bearingmember; to adapt the regulating means to facile operation and to locatethe same in such a manner as to:

render accidental or wilful displacements impossible and to attain theseends in a simple, inexpensive, strong and easily operable structure Tothe above ends my invention consists 'in such parts and combination ofparts as fall within the scope of the appended claims.

In the accompanying drawings which' form a part of this specification,Figures 1 and 2 are side and .plan elevations of my novel buffer, Fig. 3a section on line av, w, of Fig. 2, Fig. 4;, a front elevation of thesame, Fig. 5, a front view of the engaging plate, Fig. 6, a side view ofa modified form of plug, Figs. 7 and 8 side and plan views tion on line3 y, of Fig. 8, Fig. 10, a front elevation of the same.

Like reference characters indicate like parts throughout the views.

An approved form of embodiment of my device comprises a carry-sleeve Aprovided with an enlarged end portion a having attaching openings a toadmit attach- A ing screws a A portion of the interior of the tube as ata is of enlarged diameter and forms an internal shoulder a near itsouter end. At the opposite and of the tube are internal threads aadapted to engage the threads I) of the plug B provided with a squaredcentral orifice b. A plunger member C, located in the tube com rises ahead 0 provided with an annular oulder c, and a central cutaway P0111011c WhlOh receives the reduced portion 11 of therubber plug D completingthe'head- The por-' tion D is of rubber or'other resilient mate rial. Atransverse. in d traverses an opening cl in the plu has its ends rivetedin the head C. The shank E of the plunger extends partially into thesleeve A and is surrounded by a helical spring F having one end abuttingagainst the head ,0 and the other end resting against the plug B. Thisspring normally maintains the shoulder 0' against the shoulder a, andthe tension of the spring is increased or diminished by turning the plugB by means of a wrench opening it in the member H. The latter member ispreferably provided adjacent its opening with a recess h which affords aseat for a spiral spring h surrounding the pin 9' and having one enditengaging the lever, and its other end h" pressing upon the sleeveintermediate the, lugs. This spring tends to force the inner portion ofits length by the pin 9' passingthrough an the member H up against ashoulder h located upon the rear portions of the ears. The inner end ofthe lever H has a flat laterally extending arm I, and the opposite endof the lever has a head J comprising a rounded forward ortion j and adepending hook portionj 1 member H constitute a locking lever whoseforward portion extends slightly beyond the head D of the plunger 'so asto engage a member located upon the face of a door he described parts ofthe r when the latter contacts wit he head D.

The auxiliary member adapted to be attached to a door comprises in thepresent instance a flat plate K provided with openlngs k to admitattaching screws in in each end. The plate has a squared orifice Lextendinglongitudinally in'the middle of the late provi ed with abeveled or inclined ower edge Z. The door M to which the plate isattached is cutawa as at mat a point behind the plate a su ,cient depthto permit the entrance of the head J and the hook portion i of themember H. The beveled portion 1 of the plate has its uppermarA gin in ahorizontal plane of the free on plane above the normal of the hook 7'-so that.

rounded or inclined surface j of the lever strikes and rides over thebeveled portion l of the plate, and the hook 7' is b the spring k helddown in contact wit the rear portion of the plate. The upper portion ofthe plate K after contacting with the head D has a tendency to force thehead slightly rearwardly in the tube A against the tension of the sprinF, whereby the door is tightly pressed, an in conjunction with the hook7'? holds the door tightly against vibration. a

In Fig. 6 is shown a modified form of plug B in which the screw threadsare absent and this form of plug may be located frictionally in the tubeA in place of the plug B'. In the modified form of my device as shown inFigs. 7 to 10 inclusive" the sleeve A is provided near one end with anexternal shoulder a, and at its other end with exroom, and the form ofstructure shown in ternal threads an adapted to engage the thread a upona flange b of a cap B provided with a squared central openin b adaptedto receive a wrench. A tube N rictionally incloses the sleeve A,abutting at one end against the shoulder a, and at the other end againstthe flange b, and is integral with a vertical postO having an extendedlower portion 0 provided with openings 0 adapted to admit attachingscrews. In place of the ears G of the first form of my inventiona'transverse rectan ular opening P is made through the post forming theportions G in which the pin g is mounted. I ,The form of my inventionshown in Fig. 1 is adapted to mount upon the wall of a 1. In a doorbuffer, the combination of a sleeve,. a plunger yieldinglymounted in thesleeve and projecting from one end thereof, the other endof the sleevebeing provided with threads, a cap. on the sleeve having threads toengage the threads of the sleeve, a spring in the sleeve engaging thecap and plunger, the sleeve having a shoulder, a supporting member rigidwith the sleeve, said cap being removable from the sleeve independent ofthe relative movement of the sleeve and supporting member, and theplunger abutting against said shoulder.

2. In a door buffer, the combination of a sleeve, a plunger yieldinglymounted in the sleeve and projecting from one end of the sleeve, theother end of thesleeve being provided with external threads, a cap onthe sleeve provided with a central opening and with threadsadapted toengage the first mentioned threads, a spring in the sleeve engaging thecap and plunger, an external shoulder upon the sleeve, a post, and atube upon the post surrounding the sleeve, and removably receiving thesame and abutting against said .cap and shoulder, said post having atransverse aperture and bearings for the support of a lever.

In testimony whereof I have aflixed my signature in...presence of twowitnesses.

' ALBERT S. NEWTON. Witnesses:

HORATIO E. BELLOWS, WASHINGTON R. Pnnsco'rn.

